Reading your question I had to think of the Horatio Hornblower series by C.S. Forester:
http://en.wikipedia.org/wiki/Horatio_Hornblower
There are 13 books...I just read parts of one book for a literature essay so I don't really know if he dresses up as a bear ans sneaks through spain ;-) Sounds like funny plot though - and Hornblower at some points is kind of a anti-heroe; e.g. he is tonedeaf and at some point he confuses the french and britain national anthems or something like that :-)